Grade-5 Hex Cap Screw
Mechanical and Performance Data

Description:

 A cap Screw made from medium carbon steel and heat-treated.
Applications/Advantages Has greater tensile strength than a Grade-2. Yield-to-tensile ratio is the lowest of all heat treated steels.
Heat Treatment Grade-5 cap screws shall be heat treated, oil or water quenched, at the option of the manufacturer, and tmpered at a minimum tempering temperature of 800 F.
Material Medium carbon steel. Use of an alloy steel is also acceptable.
Core Hardness 1/4 through 1 in. diameter, all lengths: Rockwell C25-C34. 1-1/8 through 1-1/2 in. diameter, all lengths: Rockwell C19-C30.
Surface Hardness 1/4 through 1 in. diameter, all lengths: Rockwell 30N45 maximum. 1-1/8 through 1-1/2 in. diameter, all lengths: Rockwell 30N50 maximum.
Proof Load 1/4 through 1 in. diameter, all lengths: 85,000 psi. 1-1/8 through 1-1/2 in. diameter, all lengths: 74,000 psi.
Yield Strength* 1/4 through 1 in. diameter, all lengths: 92,000 psi minimum, 1-1/8 through 1-1/2 in. diameter, all lengths: 81,000 psi. minimum
Tensile Strength 1/4 through 1 in. diameter, all lengths: 120,000 psi. minimum 1-1/8 through 1-1/2 in. diameter, all lengths: 105,000 psi. minimum.
Elongation* 14% minimum (all diameters).
Reduction of Area* 35% minimum (all sizes)
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*These properties are tested only on machined specimens when the testing machine cannot provide for full testing of the parts.
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